This document is not restricted to specific software and hardware versions.
The information in this document was created from the devices in a specific lab environment.All of the devices used in this document started with a cleared (default) configuration.如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。
This field contains the User Location Information of the MS as defined in TS 29.060 for GPRS case, and in TS 29.274 for EPC case (e.g. CGI, SAI, RAI TAI and ECGI), if available.
This field is provided by the SGSN/MME and transferred to the S-GW/P-GW during the IP-CAN bearer activation/modification. User Location Information contains the location (e.g. CGI/SAI, ECGI/TAI or RAI) where the UE is located while opening the respective CDR.
The flags ECGI, TAI, RAI, SAI and CGI in octet 5 indicate if the corresponding fields are present in the IE or not. If one of these flags is set to "0", the corresponding field is not present at all.
根据3GPP 29.274v12第8.21部分， ULI被编码如下：
This IE shall contain only one identity of the same type (for example, more than one CGI cannot be included), but ULI IE may contain more than one identity of a different type (e.g. ECGI and TAI). The flags LAI, ECGI, TAI, RAI, SAI and CGI in octet 5 indicate if the corresponding type shall be present in a respective field or not.
If one of these flags is set to "0", the corresponding field shall not be present at all.
If more than one identity of different type is present, then they shall be sorted in the following order: CGI, SAI, RAI, TAI, ECGI, LAI.